docstr: Load dataset files into a dataframe.
docstr_tok: ["Load","dataset","files","into","a","dataframe","."]
code: def load_unprocessed_dataframe(
      self, file_paths: List[str]
  ) -> pd.DataFrame:
      """Load dataset files into a dataframe."""
      return self.output_training_and_test_data()
  
file_path: ludwig/ludwig/datasets/loaders/mnist.py
imports: import logging
  import os
  import struct
  from multiprocessing.pool import ThreadPool
  from typing import List, Optional
  import numpy
  import pandas
  import torch
  from ludwig.datasets.dataset_config import DatasetConfig
  from ludwig.datasets.loaders.dataset_loader import DatasetLoader
  from ludwig.utils.fs_utils import makedirs
label_desc: Use image node_id 3 for calling the MNISTLoader obj's underlying member method code with example usage: obj.load_unprocessed_dataframe(file_paths) and returns: self